Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Total
Beginning balance at Dec. 31, 2015	$ 110	$ 24,738	$ 118,008	$ 142,856
Beginning balance, shares at Dec. 31, 2015	11,027,177
Tax shortfall associated with stock-based compensation arrangements		(51)		(51)
Restricted stock grants, net of forfeitures	$ 1	(1)
Restricted stock grants, net of forfeitures, shares	66,781
Stock-based compensation		7,330		7,330
Net income			23,084	23,084
Ending balance at Sep. 30, 2016	$ 111	32,016	141,092	173,219
Ending balance, shares at Sep. 30, 2016	11,093,958
Beginning balance at Dec. 31, 2016	$ 111	35,453	152,810	188,374
Beginning balance, shares at Dec. 31, 2016	11,093,489
Restricted stock grants, net of forfeitures	$ 1	(1)
Restricted stock grants, net of forfeitures, shares	73,936
Stock-based compensation		8,569		8,569
Common stock dividends			(8,561)	(8,561)
Net income			27,107	27,107
Ending balance at Sep. 30, 2017	$ 112	$ 44,021	$ 171,356	$ 215,489
Ending balance, shares at Sep. 30, 2017	11,167,425